Bell crank and bar assembly

Patent metadata

Field	Value
Publication number	US-10704412-B2
Application number	US-201816153054-A
Country	US
Kind code	B2
Filing date	Oct 5, 2018
Priority date	Oct 5, 2018
Publication date	Jul 7, 2020
Grant date	Jul 7, 2020

Abstract

An assembly for use with a gas turbine engine includes a block housing, a main bell crank, a bell crank, and a sync rod. The main bell crank extends between a main bell crank first end and a main bell crank second end that is connected to an actuator. The bell crank extends between a bell crank first end and a bell crank second end that is pivotally supported by the block housing. The sync rod is connected the main bell crank first end and the bell crank first end. The sync rod defines a first tab disposed proximate a first side and extends beyond a face of the sync rod.

First claim

What is claimed is:

1. An assembly for use with a gas turbine engine, comprising:
a block housing arranged to be disposed on a case of the gas turbine engine;
a main bell crank pivotally supported by the block housing, the main bell crank extending between a main bell crank first end and a main bell crank second end that is connected to an actuator;
a bell crank extending between a bell crank first end and a bell crank second end that is pivotally supported by the block housing; and
a sync rod connected the main bell crank first end and the bell crank first end, the sync rod having a first side, a second side disposed opposite the first side, a first face and a second face disposed opposite the first face, each face extending between the first side and the second side, the sync rod defining a first tab disposed proximate the first side and extending beyond at least one of the first face and the second face.

2. The assembly of claim 1 , wherein the bell crank first end includes a bell crank first arm, a bell crank second arm, and a bell crank end wall extending between the bell crank first arm and the bell crank second arm.

3. The assembly of claim 2 , wherein the first face is disposed proximate the bell crank first arm, the second face is disposed proximate the bell crank second arm, and the second side faces towards the bell crank end wall.

4. The assembly of claim 2 , wherein the first tab is arranged to abut an end surface of at least one of the bell crank first arm and the bell crank second arm.

5. The assembly of claim 4 , wherein the end surface of at least one of the bell crank first arm and the bell crank second arm is disposed opposite the bell crank end wall.

6. The assembly of claim 4 , wherein the end surface of at least one of the bell crank first arm and the bell crank second arm defines a perturbation.

7. The assembly of claim 6 , wherein the perturbation is disposed opposite the first tab.

8. The assembly of claim 6 , wherein the sync rod defines a mounting hole that extends from the first face towards the second face.

9. The assembly of claim 8 , wherein at least one of the bell crank first arm and the bell crank second arm defines an opening.

10. The assembly of claim 9 , wherein engagement between the perturbation and the first tab inhibits the mounting hole from being disposed coaxial with the opening.

11. A method of assembling a bell crank and bar assembly, comprising:
pivotally connecting a bell crank having a bell crank first arm and a bell crank second arm to a block housing, an end surface of the bell crank second arm defines a perturbation; and
disposing a sync rod between the bell crank first arm and the bell crank second arm, the sync rod having a first side, a second side, a first face and a second face disposed opposite the first face, each face extending between the first side and the second side, the sync rod defining a first tab that is disposed proximate the first side.

12. The method of claim 11 , wherein responsive to the first tab engaging the perturbation, inhibiting the sync rod from being disposed between the bell crank first arm and the bell crank second arm.

13. The method of claim 12 , wherein the first tab extends beyond the first face in a direction that extends from the second face towards the first face.

14. The method of claim 11 , wherein responsive to the first tab engaging an end surface of the bell crank first arm, arranging the sync rod to be disposed between the bell crank first arm and the bell crank second arm.

15. A gas turbine engine, comprising:
a case disposed about a central longitudinal axis of the gas turbine engine; and
a bell crank and bar assembly, comprising:
a block housing arranged to be disposed on a case of the gas turbine engine,
a main bell crank arranged to be pivotally supported by the block housing, the main bell crank having a main bell crank first arm and a main bell crank second arm spaced apart from the main bell crank first arm,
a bell crank arranged to be pivotally supported by the block housing, the bell crank having a bell crank first arm and a bell crank second arm spaced apart from the bell crank first arm, and
a sync rod arranged to be disposed between the main bell crank first arm and the main bell crank second arm and disposed between the bell crank first arm and the bell crank second arm, the sync rod defining a first tab arranged to engage an end surface of at least one of the main bell crank second arm and the bell crank first arm.

16. The gas turbine engine of claim 15 , wherein the end surface of the main bell crank second arm defines a perturbation.

17. The gas turbine engine of claim 16 , wherein engagement between the first tab and the perturbation inhibits the sync rod from being disposed between the main bell crank first arm and the main bell crank second arm.

18. The gas turbine engine of claim 15 , wherein the end surface of the bell crank first arm defines a perturbation.

19. The gas turbine engine of claim 18 , wherein engagement between the first tab and the perturbation inhibits the sync rod from being disposed between the bell crank first arm and the bell crank second arm.

Assignees

• United Technologies Corp
• Raytheon Tech Corp

Inventors

• Dohse Lauren
• Awtry Eric Weston

Classifications

• F16H21/44

  for conveying or interconverting oscillating or reciprocating motions · CPC title

• F05D2230/60

  Assembly methods · CPC title

• F05D2260/57

  using servos, independent actuators, etc. · CPC title

• F04D29/563

  specially adapted for elastic fluid pumps · CPC title

• F01D17/162 Primary

  for axial flow, i.e. the vanes turning around axes which are essentially perpendicular to the rotor centre line (F01D17/167 takes precedence) · CPC title